#663000
Closest named color: Chestnut (#742802). oklch(37.5% 0.094 53.7), rgb(102, 48, 0).
Aa
White text reads best on this color (10.56:1).
About this color
#663000 is a dark, moderately saturated brown. In OKLCH its lightness is 37%, its chroma 0.094 and its hue 54°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.033 away. White text reads best on it, at 10.56:1.
| Hue family | Browns |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.094) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #663000 |
| RGB | rgb(102, 48, 0) |
| HSL | hsl(28, 100%, 20%) |
| OKLCH | oklch(37.5% 0.094 53.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #663000 | 10.56:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #663000 | 1.98:1 | Fails | Lc 9.9 | Not readable |
| #663000 text on white | 10.56:1 | AAA | Lc 94.0 | Preferred for body text |
| #663000 text on black | 1.98:1 | Fails | Lc -8.5 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F5E7DD
oklch(93.6% 0.02 58.1)
-
Step 200
200
#EFD3C1
oklch(88.5% 0.04 54.8)
-
Step 300
300
#E6B596
oklch(81% 0.071 53.8)
-
Step 400
400
#D78C5A
oklch(70.6% 0.113 53.6)
-
Step 500
500
#CB6D22
oklch(63.1% 0.145 53.7)
-
Step 600
600
#B05800
oklch(55.7% 0.14 54)
-
Step 700
700
#954900
oklch(49.2% 0.124 53.7)
-
Step 800
800
#7B3B00
oklch(42.8% 0.108 53.6)
-
Step 900
900 (this color)
#663000
oklch(37.5% 0.094 53.7)
-
Step 950
950
#3C1D06
oklch(26.9% 0.059 53.7)
#663000 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #403700 | 0.078 |
| Deuteranopia (no green cones) | #4D4400 | 0.071 |
| Tritanopia (no blue cones) | #712328 | 0.060 |
| Achromatopsia (no color) | #3F3F3F | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663000
#663000
oklch(37.5% 0.094 53.7)
- #004764
#004764
oklch(37.5% 0.078 234)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #663000, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.033
- Mud Brown #60460F ΔE 0.058
- Reddy Brown #6E1005 ΔE 0.062
- Purple Brown #673A3F ΔE 0.069
- Blood #770001 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.078
- Maroon #800000 ΔE 0.079
- Red Brown #8B2E16 ΔE 0.080
Use #663000 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.